3D STL, OBJ, 3DS, FBX, DXF Viewer is an app for viewing the contents of Stereo Lithography files using browser WebGL.
STL files are representations of the surfaces of solid models that have been created in CAD programs.
STL files are a neutral format that can easily be generated by almost all CAD systems. 

You can open a STL, OBJ, 3DS, FBX, DXF file to view from your computer or your Google Drive™. Provides connect with Google Drive™.
Drag and drop STL files (binary or ascii) to display. Supports binary or ascii STL files and dynamic rotation, scaling.
FBX File Viewer supports only some versions. Does not support older or specific versions.

This STL, OBJ Viewer does not save or share the file you select. It only works locally without going through the server. (HTML5 technology)

*Usage
Open a file, or Drag a STL, OBJ, 3DS, FBX, DXF file from your computer.
Left mouse button to rotate, and mouse wheel to zoom.
Middle button or Up, Down, Left, Right key to move (stl, obj).
Right click to switch between wireframe or solid rendering (stl, obj).